MC33905D Datasheet, PDF (209/766 Pages) Freescale Semiconductor, Inc – SBC Gen2 with CAN High Speed and LIN Interface

Chapter 11
Edge Port Module (EPORT)
11.1 Introduction
The edge port module (EPORT) has seven external interrupt pins, IRQ7–IRQ1. Each pin can be configured
individually as a level-sensitive interrupt pin, an edge-detecting interrupt pin (rising edge, falling edge, or
both), or a general-purpose input/output (I/O) pin. See Figure 11-1.
EPPAR[2n, 2n + 1]
Stop
Mode
Edge Detect
Logic
EPFR[n]
EPPDR[n]
Synchronizer
EPIER[n]
Rising Edge
of System Clock
D0
Q
D1
D0
Q
D1
To Interrupt
Controller
EPDR[n]
IRQx PIN
EPDDR[n]
Figure 11-1. EPORT Block Diagram
11.2 Low-Power Mode Operation
This section describes the operation of the EPORT module in low-power modes. For more information on
low-power modes, see Chapter 7, “Power Management.” Table 11-1 shows EPORT module operation in
low-power modes, and describes how this module may exit from each mode.
NOTE
The low-power interrupt control register (LPICR) in the System Control
Module specifies the interrupt level at or above which is needed to bring the
device out of a low-power mode.
Freescale Semiconductor
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
11-1